Question

The figure below represents a section of the mammalian heart:

(c) State the function of the structures represented by 2, 3 and 4.

Answer 1

The structures are as follows:

• 2 is aorta.
• 3 is the pulmonary artery.
• 4 is a pulmonary vein.

Functions :
Aorta

• Aorta is the largest artery which originates from the left ventricle.
• It collects oxygenated blood from the left ventricle and distributes it throughout the body by its branches i.e. arteries.

Pulmonary artery

• Pulmonary artery arises from the right ventricle.
• It carries deoxygenated blood from the right ventricle to the lungs.

Pulmonary vein

• Pulmonary veins arise from the lungs.
• It carries the oxygenated blood from lungs to the left atrium of the heart.